Improvement in machine for sawing paving-blocks



dotted `lteres para can.

Leners Patent No. 94,061, daad-August 24, 1869.

IZMPROVEIENT' I MACHINE 'FOR SAWING- PAVING-BLOCKS.

The Schedule referred t in these Letters Patent and making pa'rt .of the same.

To all whom 'it may concern Be it known that I, WILLIAM W. BALLARD, of Elmira, in the cou'nty of Ohemung, and State of New York, have invented a new and useful 'Improvement in Machines 'for Sawing Blocks from Lumber, for Street-Paving; and I do hereby declare the following to be a full, clear, and correct description of the same, sucient vto enable others skilled in the machinery to which my invention appertains, to fully understand and construct the same, reference being had to the accompanying drawings, which make part of this specifcation, and Ain which- Figure 1', Sheet I, represents a side view of the adjustable feed-table, parts of the balance of the. machine being iu section.

' Figure 2, Sheet I, is a top View,

Figure 3, Sheet 1I, is a side view, and

Figure 4, Sheet Il, a sectional plan of my machine...

Like letters of reference vindicate like parts in the several figures. m l

My invention is intended for the cutting of blocks for pavement, of trapezoidal form, from a square piece of timber, two blocks being always cut together in a one piece by one cut, the four sides of which piece form parallelograms, and which, by being cut in the` centre, and in a line at right angles to the top and bottom of said piece, will form two trapezoidal blocks;

, and

' It consists of an adjustable feed-table, so arranged that the timber can be so'fed tothefsaws as to be cut at any desired angle.

A, in the`drawings, represents the main -frame of my machine, on the top of which, in proper bearings, moves a shaft, B'.

Suspended fromthis shaft, and loosely grasping it, is a swinging saw-frame, C, in the lower end of which are the bearings for a shaft, D, on which the saws' E are secured.

Any desired number of saws may be employed, and the lsize of the blocks tohe cut is regulated byanumber of sleeves, e, on the shaft D, between the saws E, which may be larger or smaller, as is desirable, the whole being secured on the shaft by a screw-nut, c.

On the ends of shaft D, outside of the swinging fraine C, are secured pulleys d, which connect, by means of belts, with pulleys b on shaft B, to which latter motion is imparted by means of a belt, a, pass-4 ing over pulley c on shaft B, and a large beltfwheel, F, on a shaft, j, moving in proper bearings on frame A.

This shaft f carries a pulley, G, which receives its motion from a pulley, g, liy means of a belt.

A drum, H, is secured on the same shaf with pul-y ley g, and serves to give motion to an end ess apron, K, which moves in the line of' motion of the saws.

Secured on the under side of cross-pieces I of the frame A, are two curved racks i, into which gear the pinions `ion shaft J, in the swinging frame C.

The Wheels j are operated by a crank, l1..`

Pivoted to the end of a cross-piece, L, of the frame A, is the feed-table M, extending under the saws.

This feed-table can be placed at any desired angle to the saws, so as to regulate the angle at which the blocks are to be cut from the square timber.

The operation of the device is as follows:

Motion being imparted to the several belt-wheels and pulleys, a square piece of timber is placed on the feed-table M, and moved up to and under the saws, p

which have been swung back with their frame C,.by means of rack'i and pinion j. The saws are now movednp to the timber, and cut the blocks, after which the saws are moved back and the timber pushed up.

In pushing up-thetimber, the out pieces are forced on to the endlessfapron K, which carries the same to -any desired place. The operation of cutting is then repeated. Y

It will be easily understood, that by means of a cam-motion the saws maybe moved back and forward automatically, and that the feeding of the timber may also be accomplished by machinery. l

I have described all the parts of the machinery, to give a clear understanding of th'e connection ,of that ypart of it which I claim as my invention with the rest,

and I desire it distinctly understood that I do not .claim all the machinery herein described; but

lVhat I claim as new, and desire to secure by Letters Patent, is-

The feed-table M, when made adjustable, as herein described, for the purpose of cutting blocks for street pavements at any desired angle.

.. WM. W. BALLARD.

Witnesses:

M.l H. BALDWIN, H. T. CALDWELL. 

